ajax xml

---------------------------------AJAX.html-------------------------------------------
<html>
<head>
<title>AJAX.html</title>
</head>
<script type="text/javascript">
	/*通过异步传输XMLHTTP发送参数到ajaxServlet，返回符合条件的XML文档*/
	function getResult() {
		var url = "ajaxServlet?action=send";
		if (window.XMLHttpRequest) {
			req = new XMLHttpRequest();
		} else if (window.ActiveXObject) {
			req = new ActiveXObject("Microsoft.XMLHTTP");
		}
		if (req) {
			req.open("GET",url,true);
			req.onreadystatechange = complete;
			req.send(null);
		}
	}
	/*分析返回的XML文档*/
	function complete() {
		if (req.readyState == 4) {
			if (req.status == 200) {
				var type = req.responseXML.getElementsByTagName("type_name");
				var str = new Array();
				for (var i = 0; i < type.length; i++) {
					str[i] = type[i].firstChild.data;
					document.all['td'].innerHTML += str[i] + "<BR>";
				}
			}
		}
	}
</script>
<body onLoad="getResult()">
	<table width="80%" border="0" cellspacing="0" cellpadding="0">
		<tr>
			<td id="td"></td>
		</tr>
	</table>
</body>
</html>

---------------------------------ajaxServlet.java-----------------------------------------------------

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class ajaxServlet extends HttpServlet {
	private static final String CONTENT_TYPE = "text/xml; charset=gb2312";

	public void init() throws ServletException {
	}

	public void doGet(HttpServletRequest request,HttpServletResponse response)
			throws ServletException,IOException {
		response.setContentType(CONTENT_TYPE);
		PrintWriter out = response.getWriter();
		String action = request.getParameter("action");
		if (("send").equals(action)) {
			StringBuffer sb = new StringBuffer("<type>");
			sb.append("<type_name>AA</type_name>");
			sb.append("<type_name>BB</type_name>");
			sb.append("<type_name>CC</type_name>");
			sb.append("<type_name>DD</type_name>");
			sb.append("</type>");
			out.write(sb.toString());
			out.close();
		}
	}
}

--------------------------------web.xml------------------------------------------------------
<?xml version = '1.0' encoding = 'UTF-8'?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems,Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
 <description>Empty web.xml file for Web Application</description>
 <servlet>
  <servlet-name>ajax</servlet-name>
  <servlet-class>ajaxServlet</servlet-class>
 </servlet>
    <servlet-mapping>
        <servlet-name>ajax</servlet-name>
        <url-pattern>/ajaxServlet</url-pattern>
    </servlet-mapping>
</web-app>

原文链接：https://www.f2er.com/ajax/163817.html

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